Florida State University
Florida State University: Molecular Expressions: Introdution to Cell and Virus Structure
This resource provides a detailed diagram of animal, bacterial and plant cells and viral structure. Also included are detailed drawings, with definitions, of each of the cellular organelles.
BiologyWise
Biology Wise: Functions of a Centrosome and Its Role in Cell Division
Discusses the discovery of centrosomes, their important role in mitosis in animal cells, and their other functions.
Other
Johnson County Community College: Active Transport
This site provides a short but factual description of active transport. An animation displaying the process of active transport is also provided.